CN102673441A

CN102673441A - Backward tilting device of vehicle seat

Info

Publication number: CN102673441A
Application number: CN2011100582314A
Authority: CN
Inventors: 塚田充
Original assignee: Tachi S Co Ltd
Current assignee: Tachi S Co Ltd
Priority date: 2011-03-08
Filing date: 2011-03-08
Publication date: 2012-09-19
Anticipated expiration: 2031-03-08
Also published as: CN102673441B

Abstract

The invention provides a backward tilting device of a vehicle seat. According to the backward tilting device of the vehicle seat, the sheet thickness of a stop sheet can be reduced, and the weight is correspondingly reduced. A hook sheet (2) is arranged on any side of a seat cushion rack (5) or a seat backrest rack (7), and a stop sheet (3) for clamping the hook sheet (2) is arranged on the other side of the seat cushion rack (5) or the seat backrest rack (7); the hook sheet (2) is formed into a trapezoidal sheet (2C) with a suspended end and protrudes towards the other side by utilizing fixation of a base end (2B) of the sheet; the stop sheet (3) is formed into the shape of a convex part (3A) with an approximately U-shaped section; each end (3B) of the convex part (3A) is fixed to a fixation object by welding, so that the stop sheet (3) is formed into the shape of a closed section; and the stop sheet (3) is clamped by the hook sheet (2), so that the tilting range of a seat backrest (SB) is limited.

Description

The layback device of auto use chair

Technical field

The present invention relates to a kind of layback (リ Network ライニ Application グ) device, this layback device makes back of seat freely fascinate for the center with the turning cylinder with respect to seat cushion by the control lever mechanism that unlocks, and the scope of fascinating of qualification back of seat.

Background technology

As prior art; Layback device with the record of TOHKEMY 2001-292850 communique is in this layback device, as the formation of the scope of fascinating that limits back of seat; For example has such formation; That is, be provided with the locking plate of the engaging that is used to accept the hook sheet in the seat cushion side, this hook sheet is used for the outer end of fastening as the disc spring of retracing spring.In this known formation, a side of hook sheet, locking plate is L shaped, and the opposing party is the stepped appearance that an end has hanged, and through making this L shaped and step-like engaging each other, limits the fascinate scope of back of seat with respect to seat cushion.

Patent documentation 1: TOHKEMY 2001-292850 communique

Summary of the invention

According to such formation, L shaped requirement is configured to 2 positions, in known formation, forms L shaped of 2 positions from the plate of one, so, can not avoid the maximization of plate self.In addition, L shaped requires corresponding rigidity, necessary rigidity, and this necessary rigidity is used to limit leaning forward of the back of seat that produced by the elastic force as the disc spring of retracing spring; So; Thickness of slab is thicker, is difficult to reduce thickness of slab, the increase of the weight that can not avoid bringing thus.

The object of the present invention is to provide a kind of layback device of auto use chair of the thickness of slab that can reduce locking plate.

The layback device of auto use chair of the present invention is constituting the disc spring that is provided with on the seat frame of seat cushion towards the place ahead the back of seat frame application of force that constitutes back of seat; It is characterized in that:

Arbitrary side at seat frame or back of seat frame is provided with the hook sheet, the opposing party the locking plate of above-mentioned hook sheet fastening is set,

Above-mentioned hook sheet forms step-like that an end has hanged, utilizes the fixing and side-prominent towards the opposing party of its cardinal extremity,

Above-mentioned locking plate forms has the shape that the cross section is roughly the protrusion of U-shaped, and be fixed on the fixed object by welding through each end, thereby locking plate is formed the closed section shape this protrusion,

Above-mentioned locking plate limits the scope of fascinating of back of seat through the engaging of accepting the hook sheet.

As L shaped alternative structure, locking plate formed have the roughly shape of U-shaped protrusion, be fixed on the fixed object with welding each end this protrusion; Thereby locking plate is formed the closed section shape; So, also can improve rigidity even locking plate is a light sheet, for this reason; Can realize the reducing of thickness of slab of locking plate, reduce quality.

Along radially being provided with in front and back of above-mentioned disc spring, then when the back of seat hypsokinesis on the locking plate of hook sheet fastening at rear side, when back of seat leaned forward, the fastening of hook sheet was on the locking plate of front side like above-mentioned locking plate, and the scope of fascinating of back of seat can limit in front and back.

According to the present invention, can reduce the thickness of slab of locking plate, correspondingly reduce quality.

Description of drawings

Fig. 1 is the lateral plan of an embodiment of expression auto use chair of the present invention.

Fig. 2 is the lateral plan of wanting portion of expression auto use chair of the present invention.

Fig. 3 is the III-III line cutaway view of Fig. 2.

The specific embodiment

Below, the preferred implementation of the layback device of the auto use chair that present invention will be described in detail with reference to the accompanying.

As shown in Figure 1, auto use chair S has layback device R, and with respect to the seat frame 5 that constitutes seat cushion SC, fascinating connects the back rest 7 that is used to constitute back of seat SB freely.

7 of seat frame 5 and back rests, connect known in the past blocking device 6, make it possible to limit the rotation of backrest SB, the angle of inclination of back of seat SB can at random be adjusted, set.

On this seat frame 5, that kind as shown in Figure 2, the moving center that rotates is set to the disc spring 1 of retracing spring, the radial inner end 1A of this disc spring 1 as the fixed end fastening on the fastening sheet 5A of seat frame 5.In addition, the outer end 1B of disc spring 1 for example as the movable end fastening at hook sheet 2, this hook sheet 2 is fixed on the back rest 7.This hook sheet 2 forms step-like that an end has hanged, and its cardinal extremity 2B is fixed on the back rest 7, and L shaped 2A is projected into the opposing party's side, and the outer end 1B fastening of disc spring 1 is on L shaped 2A.

For this reason; Under the release position of the locking of having removed blocking device 6, be applied on the back rest 7 through hook sheet 2 from disc spring 1 towards the elastic force of direction of leaning forward, so; Along with the restriction cancellation of layback device, back of seat SB can be in the effect of the elastic force of this disc spring 1 down towards the direction rotation of leaning forward.

Like Fig. 2, such shown in 3, along the periphery of disc spring 1, the footpath that locking

plate

3,3 is weldingly fixed on disc spring 1 forwards, backwards at seat frame 5.

The cross sectional shape of locking plate 3 that kind as shown in Figure 3 is provided with the protrusion 3A of U-shaped roughly and from this

extension

3B, 3B of stretching out towards lateral direction of each end of the protrusion 3A of U-shaped roughly, this

extension

3B, 3B are fixed on the seat frame 5.

Locking plate

3,3 welds fixing along the periphery of disc spring 1, when back of seat SB fascinated, as the step-like 2C of the hook sheet 2 of movable end and the position of

locking plate

3,3 fastenings,

locking plate

3,3 was fixed on the side of seat frame 5.

Locking plate

3,3 is when back of seat SB is moving towards anteversion and retroversion, and as the step-like 2C of the hook sheet 2 of movable end and the position of

locking plate

3,3 fastenings,

locking plate

3,3 is fixed on the side of seat frame 5; So, under the latch-release state, back rest 7 is leaned forward; Step-like 2C up to being fixed on the hook sheet 2 on the back rest 7 abuts to fwd locking plate 3; In addition, can make back rest 7 hypsokinesis, abut to the locking plate 3 of back up to step-like 2C of locking plate 2.Locking plate 3 becomes the closed section shape, for this reason, even step-like 2C butt of hook sheet 2 and engaging, owing to have rigidity, so, also can bear load by thin thickness of slab from hook sheet 2, can limit fascinating of back rest 7.

Because locking plate 3 becomes the closed section shape, so, even the thickness of slab of locking plate 3 is thinner, also can bear load from hook sheet 2, so, the quality of locking plate 3 can be reduced.In addition, locking plate 3 is because thickness of slab is thinner, so it is made to make and can become easy.

Although clear locking plate 3 is fixed on the occasion of front and back; But any before and after also can being fixed at this moment, can make back rest 7 lean forward; Step-like 2C up to being fixed on the hook sheet 2 on the back rest 7 abuts to locking plate 3; In addition, can make back rest 7 hypsokinesis, abut to the locking plate 3 of back up to step-like 2C of hook sheet 2.

In the above-described embodiments, although understand hook sheet 2 is arranged on the occasion on the back rest 7, but also can hook sheet 2 be arranged on the seat frame 5, at this moment, as long as locking plate 3 is set on back rest 7.

Locking plate 3 can change its fixed position, through only changing the fixed position, can change the scope of fascinating of back rest 7.

In addition, in an embodiment, although the protrusion 3A of clear locking plate 3 be the occasion in U-shaped cross section roughly, but need only and fixed object (seat frame 5) between become the shape of closed section, so roughly Contraband shape is also contained in said U-shaped here.In addition, embodiment has specialized the formation of the outer end 1B of fastening disc spring 1 on L shaped 2A of hook sheet 2, but also can not be provided with L shaped at hook sheet 2, but at the outer end 1B of other all-in-one-piece fastening sheet fastening disc spring 1.

Symbol 4 is a control lever, for the locking of blocking device being removed the bar of operation.The base end part of this control lever 4 is applied by the retracing spring 8 of the central authorities that are wrapped in disc spring 1 and is used to make blocking device to become the elastic force of lock-out state.

That is, by retracing spring 8 application of forces, as towards lower direction operating portion 4B being operated, then remove by the lock-out state of blocking device in order to become the last direction of diagram for the operating portion 4B of control lever 4.

Description of reference numerals

S ... Auto use chair, SC ... Seat cushion, 1 ... Disc spring, 2 ... The hook sheet, 3 ... Locking plate, 4 ... Control lever, 5 ... Seat frame, 7 ... Back rest.

Claims

1. the layback device of an auto use chair, the layback device of said auto use chair is provided with towards the place ahead the disc spring to the back of seat frame application of force that constitutes back of seat on the seat frame that constitutes seat cushion; It is characterized in that:

Arbitrary side at seat frame or back of seat frame is provided with the hook sheet, the opposing party the locking plate of said hook sheet fastening is set,

Said hook sheet forms step-like that an end has hanged, utilizes the fixing and side-prominent towards the opposing party of its cardinal extremity,

Said locking plate forms has the shape that the cross section is roughly the protrusion of U-shaped, and be fixed on the fixed object by welding through each end, thereby make locking plate become the closed section shape this protrusion,

Said locking plate limits the scope of fascinating of back of seat through the engaging of accepting the hook sheet.

2. the layback device of auto use chair according to claim 1 is characterized in that: said locking plate radially is provided with in front and back along said disc spring.